package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BusinessException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishServiceImpl dishService;
    @Autowired
    private SetmealServiceImpl setmealService;
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> qw=new LambdaQueryWrapper<>();
        qw.eq(Dish::getCategoryId,id);
        int count = dishService.count(qw);
        if(count>0){
            throw new BusinessException("当前分类下关联了菜品，不能删除");
        }

        LambdaQueryWrapper<Setmeal> qw1 = new LambdaQueryWrapper<>();
        qw1.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(qw1);
        if(count2 > 0){
            throw new BusinessException("当前分类下关联了套餐，不能删除");//已经关联套餐，抛出一个业务异常
        }
        super.removeById(id);
    }
}
